Transform everyday paper cups into a beautiful dodecahedron-shaped lamp or lantern with this easy and eco-friendly DIY tutorial. By cutting and folding the rims of 12 paper cups, a unique geometric ...

Even though mathematicians have spent over 2,000 years dissecting the structure of the five Platonic solids — the tetrahedron, cube, octahedron, icosahedron and dodecahedron — there’s still a lot we ...